Attachment-plug.



W. C. THEGONING.

ATTACHMENT PLUG. APPLICATION man OCT- 2. m4.

Patented Aug. 28, 1917. v

WITNESSES ATTORNEYS nal C is rounded and raised and bent at right. angles to. the main stem and said end I fits snugly in the upper end of body B and prevents displacement thereof when contact is made and the'plug is screwed home in a socket. J

What I claim is:

1. An attachment plug comprising an insulating base having a cylindrical body por- 'tion, an externally screw threaded portion,

electrically connected with the other termi-' nal and a cord gripping member having an internally. threaded portion for engaging said externally threaded portion, and having an abutment portion for forcing the conductors against said shoulders.

Gupta: 0! tbil patent'may be obtained for 2. An electrical attachment plug, comprising a cylindrical body having an annular shoulder between its ends and provided with a screw-threaded inner'end having side recesses and having a longitudinal opening extending frond one of. said recesses to the outer end of said body, a screw shell having a flange to engagesaid shoulder and provided with a. terminal extending'into one of said side recesses, an end contact having a terminal extending through said longitudinal openinginto the'otherside recess, binding screws for said terminals, and

a wire-gripping member having an internal screw threaded portion to engage and in- -close the screw-threaded and recessed inner end of said body and provided with a conical wire-gripping surface to grip con' ducting wires leading to said bindingscrews. In testimony whereof]: affix my .signa ture in presence of two witnesses.

WILLIAM C. TREGONING. Witnessesz' i It. B. MOSER, E. M. FISHER.

five cents each, by addressing the Goinmissloner o! Yatentl. Washington, 'D. C. 

